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author | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2015-11-19 18:39:22 +0100 |
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committer | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2016-02-21 15:03:44 +0100 |
commit | e40ba6d56b41754b37b995dbc8035b2b3a6afd8a (patch) | |
tree | 0bbc573dde5374e434d6acd883b330f92645bfe2 /scripts/Makefile.lib | |
parent | vfs: define kernel_read_file_from_path (diff) | |
download | linux-e40ba6d56b41754b37b995dbc8035b2b3a6afd8a.tar.xz linux-e40ba6d56b41754b37b995dbc8035b2b3a6afd8a.zip |
firmware: replace call to fw_read_file_contents() with kernel version
Replace the fw_read_file_contents with kernel_file_read_from_path().
Although none of the upstreamed LSMs define a kernel_fw_from_file hook,
IMA is called by the security function to prevent unsigned firmware from
being loaded and to measure/appraise signed firmware, based on policy.
Instead of reading the firmware twice, once for measuring/appraising the
firmware and again for reading the firmware contents into memory, the
kernel_post_read_file() security hook calculates the file hash based on
the in memory file buffer. The firmware is read once.
This patch removes the LSM kernel_fw_from_file() hook and security call.
Changelog v4+:
- revert dropped buf->size assignment - reported by Sergey Senozhatsky
v3:
- remove kernel_fw_from_file hook
- use kernel_file_read_from_path() - requested by Luis
v2:
- reordered and squashed firmware patches
- fix MAX firmware size (Kees Cook)
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Luis R. Rodriguez <mcgrof@kernel.org>
Diffstat (limited to 'scripts/Makefile.lib')
0 files changed, 0 insertions, 0 deletions